SDR 9WGA2026042725802

Service difficulty report · Skin · Boeing 747400

Difficulty date: April 25, 2026
Submitted: April 27, 2026
Operation: Air carrier
Aircraft: N258SN
Make and model: Boeing 747400
Aircraft serial: 29258
Aircraft time: 94,698 hours, 15,226 cycles
System (JASC): 5730 · Wing, Plate/Skin
Part: Skin
Condition: Corroded
Location: Zone 600 Te
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

RIGHT HAND WING UPPER SURFACE TRAILING EDGE SIDE WAS FOUND WITH CORROSION FROM STA ERSS 1646.716 TO WBL 1247, DURING HEAVY CHECK, PER WO 15698, NRC 940659, SEQ 459, PERFORMED BLEND AREA RH WING UPPER SURFACE T/E SIDE FROM STA ERSS 1646.716 TO WBC 1241 (1687 - 1694) IAW B747-400 SRM 51-10-02, SRM 57-20-01, BOEING WGN-WGN 26-0023-068 AND RDR WGN-WGN-26-0023-09B, ISSUED WGA REP-44-258-189

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